package com.h3bpm.web.utils;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.http.*;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * Client工具类
 * @author pan94
 * @auto
 */


public class HttpClientUtils {
    static  final String  UTF8 = "UTF-8";

    private static final Logger log = LoggerFactory.getLogger(HttpClientUtils.class);
    /**
     * get请求
     * @return
     */
    public static String doGet(String url) {
        try {
            HttpClient client =  HttpClientBuilder.create().build();

            //发送get请求
            HttpGet request = new HttpGet(url);
            //设置超时时间
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(1000).setSocketTimeout(5000).build();
            request.setConfig(requestConfig);



            HttpResponse response = client.execute(request);

            /**请求发送成功，并得到响应**/

            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

                /**读取服务器返回过来的json字符串数据**/

                String strResult = EntityUtils.toString(response.getEntity());

                return strResult;
            }


        } catch (IOException e) {
            e.printStackTrace();

        }

        return null;

    }



    /**

     * post请求(用于key-value格式的参数)

     * @param url

     * @param params

     * @return

     */

    public static String doPost( String url, Map params ){
        BufferedReader in = null;
        try {
            /* 定义HttpClient */
            HttpClient client =  HttpClientBuilder.create().build();

            /* 实例化HTTP方法 */
            HttpPost request = new HttpPost();
            request.setURI( new URI( url ) );
            //设置超时时间
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(1000).setSocketTimeout(5000).build();
            request.setConfig(requestConfig);

            /* 设置参数 */
            List <NameValuePair> nvps = new ArrayList <NameValuePair> ();

            for ( Iterator iter = params.keySet().iterator(); iter.hasNext(); ) {
                String name = (String) iter.next();

                String value = String.valueOf( params.get( name ) );

                nvps.add( new BasicNameValuePair( name, value ) );
            }

            request.setEntity( new UrlEncodedFormEntity( nvps, HttpClientUtils.UTF8) );
            HttpResponse response = client.execute( request );

            int	code	= response.getStatusLine().getStatusCode();
            Integer lb	= 200;
            if ( code == lb ) {
                in = new BufferedReader( new InputStreamReader( response.getEntity()

                        .getContent(), HttpClientUtils.UTF8) );

                StringBuffer sb = new StringBuffer( "" );

                String line = "";

                String nl = System.getProperty( "line.separator" );

                while ( (line = in.readLine() ) != null ) {
                    sb.append( line + nl );
                }
                in.close();
                return(sb.toString() );
            } else {
                System.out.println( "状态码：" + code );
                return null;
            }
        } catch ( Exception e ) {
            e.printStackTrace();
            return null;
        }
    }



    /**
     * post请求（用于请求json格式的参数）
     * @param url
     * @param params
     * @return
     */
    public static String doPost( String url, String params ) throws Exception{
        CloseableHttpClient httpclient = HttpClients.createDefault();

        HttpPost httpPost = new HttpPost( url );
        httpPost.setHeader( "Accept", "application/json" );
        httpPost.setHeader( "Content-Type", "application/json" );


        StringEntity entity = new StringEntity( params, HttpClientUtils.UTF8 );
        httpPost.setEntity( entity );
        CloseableHttpResponse response = null;

        //设置超时时间
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(1000).setSocketTimeout(5000).build();
        httpPost.setConfig(requestConfig);

        try {
            response = httpclient.execute( httpPost );
            StatusLine status = response.getStatusLine();
            int state = status.getStatusCode();
            if ( state == HttpStatus.SC_OK ){
                HttpEntity responseEntity = response.getEntity();
                String jsonString = EntityUtils.toString( responseEntity );
                return jsonString;
            } else {
                log.error( "请求返回:" + state + "(" + url + ")" );
            }
        } finally {
            if ( response != null ){
                try {
                    response.close();
                } catch ( IOException e ) {
                    e.printStackTrace();
                }
            }
            try {
                httpclient.close();
            } catch ( IOException e ) {
                e.printStackTrace();
            }
        }
        return(null);
    }

    public static JSONObject doPost(String url, JSONObject json){
        HttpClient client = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost(url);
        JSONObject response = null;
        try {
            StringEntity s = new StringEntity(json.toString());
            s.setContentEncoding("UTF-8");
            //发送json数据需要设置contentType
            s.setContentType("application/json");
            post.setEntity(s);
            HttpResponse res = client.execute(post);
            if(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                HttpEntity entity = res.getEntity();
                // 返回json格式：
                String result = EntityUtils.toString(entity);
                response = JSONObject.parseObject(result);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return response;
    }

    public static String httpPost(String url,String json){
        PostMethod post = null;
        try {

            org.apache.commons.httpclient.HttpClient httpclient = new org.apache.commons.httpclient.HttpClient();
            post = new PostMethod(url);
            post.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "utf-8");
            post.addRequestHeader("Content-Type", "application/json;charset=utf-8");
            post.setRequestEntity(new ByteArrayRequestEntity(json.getBytes("UTF-8")));
            httpclient.executeMethod(post);
            return new String(post.getResponseBody(), "utf-8");
        } catch (IOException e) {
            log.info("http发生错误 : {}", e.getStackTrace());
        }finally {
            post.releaseConnection();
        }
        return null;
    }


    public static JSON HttpMultipartFormdata(byte [] file, Map<String,String> data, String url,String fileName) throws Exception {

        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpPost uploadFile = new HttpPost(url);

        //设置超时时间
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(1000).setSocketTimeout(5000).build();
        uploadFile.setConfig(requestConfig);


        MultipartEntityBuilder builder = MultipartEntityBuilder.create();

        data.entrySet().stream().forEach(et ->{
            builder.addTextBody(et.getKey(), new String(et.getValue().getBytes(Consts.UTF_8), Consts.ISO_8859_1), ContentType.TEXT_PLAIN);
        });


        // 把文件加到HTTP的post请求中
        builder.addBinaryBody("file",file ,
                ContentType.APPLICATION_OCTET_STREAM,
                new String(fileName.getBytes(Consts.UTF_8),Consts.ASCII));

        HttpEntity multipart = builder.build();
        uploadFile.setEntity(multipart);
        CloseableHttpResponse response = httpClient.execute(uploadFile);
        HttpEntity responseEntity = response.getEntity();
        String sResponse=EntityUtils.toString(responseEntity, "UTF-8");
        System.out.println("Post 返回结果"+sResponse);

        return JSON.parseObject(sResponse);
    }

}